object: convert parse_object* to take struct object_id
[git/git.git] / builtin / reflog.c
1 #include "builtin.h"
2 #include "lockfile.h"
3 #include "commit.h"
4 #include "refs.h"
5 #include "dir.h"
6 #include "tree-walk.h"
7 #include "diff.h"
8 #include "revision.h"
9 #include "reachable.h"
10
11 /* NEEDSWORK: switch to using parse_options */
12 static const char reflog_expire_usage[] =
13 "git reflog expire [--expire=<time>] [--expire-unreachable=<time>] [--rewrite] [--updateref] [--stale-fix] [--dry-run | -n] [--verbose] [--all] <refs>...";
14 static const char reflog_delete_usage[] =
15 "git reflog delete [--rewrite] [--updateref] [--dry-run | -n] [--verbose] <refs>...";
16 static const char reflog_exists_usage[] =
17 "git reflog exists <ref>";
18
19 static unsigned long default_reflog_expire;
20 static unsigned long default_reflog_expire_unreachable;
21
22 struct cmd_reflog_expire_cb {
23 struct rev_info revs;
24 int stalefix;
25 unsigned long expire_total;
26 unsigned long expire_unreachable;
27 int recno;
28 };
29
30 struct expire_reflog_policy_cb {
31 enum {
32 UE_NORMAL,
33 UE_ALWAYS,
34 UE_HEAD
35 } unreachable_expire_kind;
36 struct commit_list *mark_list;
37 unsigned long mark_limit;
38 struct cmd_reflog_expire_cb cmd;
39 struct commit *tip_commit;
40 struct commit_list *tips;
41 };
42
43 struct collected_reflog {
44 unsigned char sha1[20];
45 char reflog[FLEX_ARRAY];
46 };
47
48 struct collect_reflog_cb {
49 struct collected_reflog **e;
50 int alloc;
51 int nr;
52 };
53
54 #define INCOMPLETE (1u<<10)
55 #define STUDYING (1u<<11)
56 #define REACHABLE (1u<<12)
57
58 static int tree_is_complete(const struct object_id *oid)
59 {
60 struct tree_desc desc;
61 struct name_entry entry;
62 int complete;
63 struct tree *tree;
64
65 tree = lookup_tree(oid);
66 if (!tree)
67 return 0;
68 if (tree->object.flags & SEEN)
69 return 1;
70 if (tree->object.flags & INCOMPLETE)
71 return 0;
72
73 if (!tree->buffer) {
74 enum object_type type;
75 unsigned long size;
76 void *data = read_sha1_file(oid->hash, &type, &size);
77 if (!data) {
78 tree->object.flags |= INCOMPLETE;
79 return 0;
80 }
81 tree->buffer = data;
82 tree->size = size;
83 }
84 init_tree_desc(&desc, tree->buffer, tree->size);
85 complete = 1;
86 while (tree_entry(&desc, &entry)) {
87 if (!has_sha1_file(entry.oid->hash) ||
88 (S_ISDIR(entry.mode) && !tree_is_complete(entry.oid))) {
89 tree->object.flags |= INCOMPLETE;
90 complete = 0;
91 }
92 }
93 free_tree_buffer(tree);
94
95 if (complete)
96 tree->object.flags |= SEEN;
97 return complete;
98 }
99
100 static int commit_is_complete(struct commit *commit)
101 {
102 struct object_array study;
103 struct object_array found;
104 int is_incomplete = 0;
105 int i;
106
107 /* early return */
108 if (commit->object.flags & SEEN)
109 return 1;
110 if (commit->object.flags & INCOMPLETE)
111 return 0;
112 /*
113 * Find all commits that are reachable and are not marked as
114 * SEEN. Then make sure the trees and blobs contained are
115 * complete. After that, mark these commits also as SEEN.
116 * If some of the objects that are needed to complete this
117 * commit are missing, mark this commit as INCOMPLETE.
118 */
119 memset(&study, 0, sizeof(study));
120 memset(&found, 0, sizeof(found));
121 add_object_array(&commit->object, NULL, &study);
122 add_object_array(&commit->object, NULL, &found);
123 commit->object.flags |= STUDYING;
124 while (study.nr) {
125 struct commit *c;
126 struct commit_list *parent;
127
128 c = (struct commit *)study.objects[--study.nr].item;
129 if (!c->object.parsed && !parse_object(&c->object.oid))
130 c->object.flags |= INCOMPLETE;
131
132 if (c->object.flags & INCOMPLETE) {
133 is_incomplete = 1;
134 break;
135 }
136 else if (c->object.flags & SEEN)
137 continue;
138 for (parent = c->parents; parent; parent = parent->next) {
139 struct commit *p = parent->item;
140 if (p->object.flags & STUDYING)
141 continue;
142 p->object.flags |= STUDYING;
143 add_object_array(&p->object, NULL, &study);
144 add_object_array(&p->object, NULL, &found);
145 }
146 }
147 if (!is_incomplete) {
148 /*
149 * make sure all commits in "found" array have all the
150 * necessary objects.
151 */
152 for (i = 0; i < found.nr; i++) {
153 struct commit *c =
154 (struct commit *)found.objects[i].item;
155 if (!tree_is_complete(&c->tree->object.oid)) {
156 is_incomplete = 1;
157 c->object.flags |= INCOMPLETE;
158 }
159 }
160 if (!is_incomplete) {
161 /* mark all found commits as complete, iow SEEN */
162 for (i = 0; i < found.nr; i++)
163 found.objects[i].item->flags |= SEEN;
164 }
165 }
166 /* clear flags from the objects we traversed */
167 for (i = 0; i < found.nr; i++)
168 found.objects[i].item->flags &= ~STUDYING;
169 if (is_incomplete)
170 commit->object.flags |= INCOMPLETE;
171 else {
172 /*
173 * If we come here, we have (1) traversed the ancestry chain
174 * from the "commit" until we reach SEEN commits (which are
175 * known to be complete), and (2) made sure that the commits
176 * encountered during the above traversal refer to trees that
177 * are complete. Which means that we know *all* the commits
178 * we have seen during this process are complete.
179 */
180 for (i = 0; i < found.nr; i++)
181 found.objects[i].item->flags |= SEEN;
182 }
183 /* free object arrays */
184 free(study.objects);
185 free(found.objects);
186 return !is_incomplete;
187 }
188
189 static int keep_entry(struct commit **it, struct object_id *oid)
190 {
191 struct commit *commit;
192
193 if (is_null_oid(oid))
194 return 1;
195 commit = lookup_commit_reference_gently(oid, 1);
196 if (!commit)
197 return 0;
198
199 /*
200 * Make sure everything in this commit exists.
201 *
202 * We have walked all the objects reachable from the refs
203 * and cache earlier. The commits reachable by this commit
204 * must meet SEEN commits -- and then we should mark them as
205 * SEEN as well.
206 */
207 if (!commit_is_complete(commit))
208 return 0;
209 *it = commit;
210 return 1;
211 }
212
213 /*
214 * Starting from commits in the cb->mark_list, mark commits that are
215 * reachable from them. Stop the traversal at commits older than
216 * the expire_limit and queue them back, so that the caller can call
217 * us again to restart the traversal with longer expire_limit.
218 */
219 static void mark_reachable(struct expire_reflog_policy_cb *cb)
220 {
221 struct commit_list *pending;
222 unsigned long expire_limit = cb->mark_limit;
223 struct commit_list *leftover = NULL;
224
225 for (pending = cb->mark_list; pending; pending = pending->next)
226 pending->item->object.flags &= ~REACHABLE;
227
228 pending = cb->mark_list;
229 while (pending) {
230 struct commit_list *parent;
231 struct commit *commit = pop_commit(&pending);
232 if (commit->object.flags & REACHABLE)
233 continue;
234 if (parse_commit(commit))
235 continue;
236 commit->object.flags |= REACHABLE;
237 if (commit->date < expire_limit) {
238 commit_list_insert(commit, &leftover);
239 continue;
240 }
241 commit->object.flags |= REACHABLE;
242 parent = commit->parents;
243 while (parent) {
244 commit = parent->item;
245 parent = parent->next;
246 if (commit->object.flags & REACHABLE)
247 continue;
248 commit_list_insert(commit, &pending);
249 }
250 }
251 cb->mark_list = leftover;
252 }
253
254 static int unreachable(struct expire_reflog_policy_cb *cb, struct commit *commit, struct object_id *oid)
255 {
256 /*
257 * We may or may not have the commit yet - if not, look it
258 * up using the supplied sha1.
259 */
260 if (!commit) {
261 if (is_null_oid(oid))
262 return 0;
263
264 commit = lookup_commit_reference_gently(oid, 1);
265
266 /* Not a commit -- keep it */
267 if (!commit)
268 return 0;
269 }
270
271 /* Reachable from the current ref? Don't prune. */
272 if (commit->object.flags & REACHABLE)
273 return 0;
274
275 if (cb->mark_list && cb->mark_limit) {
276 cb->mark_limit = 0; /* dig down to the root */
277 mark_reachable(cb);
278 }
279
280 return !(commit->object.flags & REACHABLE);
281 }
282
283 /*
284 * Return true iff the specified reflog entry should be expired.
285 */
286 static int should_expire_reflog_ent(struct object_id *ooid, struct object_id *noid,
287 const char *email, unsigned long timestamp, int tz,
288 const char *message, void *cb_data)
289 {
290 struct expire_reflog_policy_cb *cb = cb_data;
291 struct commit *old, *new;
292
293 if (timestamp < cb->cmd.expire_total)
294 return 1;
295
296 old = new = NULL;
297 if (cb->cmd.stalefix &&
298 (!keep_entry(&old, ooid) || !keep_entry(&new, noid)))
299 return 1;
300
301 if (timestamp < cb->cmd.expire_unreachable) {
302 if (cb->unreachable_expire_kind == UE_ALWAYS)
303 return 1;
304 if (unreachable(cb, old, ooid) || unreachable(cb, new, noid))
305 return 1;
306 }
307
308 if (cb->cmd.recno && --(cb->cmd.recno) == 0)
309 return 1;
310
311 return 0;
312 }
313
314 static int push_tip_to_list(const char *refname, const struct object_id *oid,
315 int flags, void *cb_data)
316 {
317 struct commit_list **list = cb_data;
318 struct commit *tip_commit;
319 if (flags & REF_ISSYMREF)
320 return 0;
321 tip_commit = lookup_commit_reference_gently(oid, 1);
322 if (!tip_commit)
323 return 0;
324 commit_list_insert(tip_commit, list);
325 return 0;
326 }
327
328 static void reflog_expiry_prepare(const char *refname,
329 const struct object_id *oid,
330 void *cb_data)
331 {
332 struct expire_reflog_policy_cb *cb = cb_data;
333
334 if (!cb->cmd.expire_unreachable || !strcmp(refname, "HEAD")) {
335 cb->tip_commit = NULL;
336 cb->unreachable_expire_kind = UE_HEAD;
337 } else {
338 cb->tip_commit = lookup_commit_reference_gently(oid, 1);
339 if (!cb->tip_commit)
340 cb->unreachable_expire_kind = UE_ALWAYS;
341 else
342 cb->unreachable_expire_kind = UE_NORMAL;
343 }
344
345 if (cb->cmd.expire_unreachable <= cb->cmd.expire_total)
346 cb->unreachable_expire_kind = UE_ALWAYS;
347
348 cb->mark_list = NULL;
349 cb->tips = NULL;
350 if (cb->unreachable_expire_kind != UE_ALWAYS) {
351 if (cb->unreachable_expire_kind == UE_HEAD) {
352 struct commit_list *elem;
353
354 for_each_ref(push_tip_to_list, &cb->tips);
355 for (elem = cb->tips; elem; elem = elem->next)
356 commit_list_insert(elem->item, &cb->mark_list);
357 } else {
358 commit_list_insert(cb->tip_commit, &cb->mark_list);
359 }
360 cb->mark_limit = cb->cmd.expire_total;
361 mark_reachable(cb);
362 }
363 }
364
365 static void reflog_expiry_cleanup(void *cb_data)
366 {
367 struct expire_reflog_policy_cb *cb = cb_data;
368
369 if (cb->unreachable_expire_kind != UE_ALWAYS) {
370 if (cb->unreachable_expire_kind == UE_HEAD) {
371 struct commit_list *elem;
372 for (elem = cb->tips; elem; elem = elem->next)
373 clear_commit_marks(elem->item, REACHABLE);
374 free_commit_list(cb->tips);
375 } else {
376 clear_commit_marks(cb->tip_commit, REACHABLE);
377 }
378 }
379 }
380
381 static int collect_reflog(const char *ref, const struct object_id *oid, int unused, void *cb_data)
382 {
383 struct collected_reflog *e;
384 struct collect_reflog_cb *cb = cb_data;
385
386 FLEX_ALLOC_STR(e, reflog, ref);
387 hashcpy(e->sha1, oid->hash);
388 ALLOC_GROW(cb->e, cb->nr + 1, cb->alloc);
389 cb->e[cb->nr++] = e;
390 return 0;
391 }
392
393 static struct reflog_expire_cfg {
394 struct reflog_expire_cfg *next;
395 unsigned long expire_total;
396 unsigned long expire_unreachable;
397 char pattern[FLEX_ARRAY];
398 } *reflog_expire_cfg, **reflog_expire_cfg_tail;
399
400 static struct reflog_expire_cfg *find_cfg_ent(const char *pattern, size_t len)
401 {
402 struct reflog_expire_cfg *ent;
403
404 if (!reflog_expire_cfg_tail)
405 reflog_expire_cfg_tail = &reflog_expire_cfg;
406
407 for (ent = reflog_expire_cfg; ent; ent = ent->next)
408 if (!strncmp(ent->pattern, pattern, len) &&
409 ent->pattern[len] == '\0')
410 return ent;
411
412 FLEX_ALLOC_MEM(ent, pattern, pattern, len);
413 *reflog_expire_cfg_tail = ent;
414 reflog_expire_cfg_tail = &(ent->next);
415 return ent;
416 }
417
418 static int parse_expire_cfg_value(const char *var, const char *value, unsigned long *expire)
419 {
420 if (!value)
421 return config_error_nonbool(var);
422 if (parse_expiry_date(value, expire))
423 return error(_("'%s' for '%s' is not a valid timestamp"),
424 value, var);
425 return 0;
426 }
427
428 /* expiry timer slot */
429 #define EXPIRE_TOTAL 01
430 #define EXPIRE_UNREACH 02
431
432 static int reflog_expire_config(const char *var, const char *value, void *cb)
433 {
434 const char *pattern, *key;
435 int pattern_len;
436 unsigned long expire;
437 int slot;
438 struct reflog_expire_cfg *ent;
439
440 if (parse_config_key(var, "gc", &pattern, &pattern_len, &key) < 0)
441 return git_default_config(var, value, cb);
442
443 if (!strcmp(key, "reflogexpire")) {
444 slot = EXPIRE_TOTAL;
445 if (parse_expire_cfg_value(var, value, &expire))
446 return -1;
447 } else if (!strcmp(key, "reflogexpireunreachable")) {
448 slot = EXPIRE_UNREACH;
449 if (parse_expire_cfg_value(var, value, &expire))
450 return -1;
451 } else
452 return git_default_config(var, value, cb);
453
454 if (!pattern) {
455 switch (slot) {
456 case EXPIRE_TOTAL:
457 default_reflog_expire = expire;
458 break;
459 case EXPIRE_UNREACH:
460 default_reflog_expire_unreachable = expire;
461 break;
462 }
463 return 0;
464 }
465
466 ent = find_cfg_ent(pattern, pattern_len);
467 if (!ent)
468 return -1;
469 switch (slot) {
470 case EXPIRE_TOTAL:
471 ent->expire_total = expire;
472 break;
473 case EXPIRE_UNREACH:
474 ent->expire_unreachable = expire;
475 break;
476 }
477 return 0;
478 }
479
480 static void set_reflog_expiry_param(struct cmd_reflog_expire_cb *cb, int slot, const char *ref)
481 {
482 struct reflog_expire_cfg *ent;
483
484 if (slot == (EXPIRE_TOTAL|EXPIRE_UNREACH))
485 return; /* both given explicitly -- nothing to tweak */
486
487 for (ent = reflog_expire_cfg; ent; ent = ent->next) {
488 if (!wildmatch(ent->pattern, ref, 0, NULL)) {
489 if (!(slot & EXPIRE_TOTAL))
490 cb->expire_total = ent->expire_total;
491 if (!(slot & EXPIRE_UNREACH))
492 cb->expire_unreachable = ent->expire_unreachable;
493 return;
494 }
495 }
496
497 /*
498 * If unconfigured, make stash never expire
499 */
500 if (!strcmp(ref, "refs/stash")) {
501 if (!(slot & EXPIRE_TOTAL))
502 cb->expire_total = 0;
503 if (!(slot & EXPIRE_UNREACH))
504 cb->expire_unreachable = 0;
505 return;
506 }
507
508 /* Nothing matched -- use the default value */
509 if (!(slot & EXPIRE_TOTAL))
510 cb->expire_total = default_reflog_expire;
511 if (!(slot & EXPIRE_UNREACH))
512 cb->expire_unreachable = default_reflog_expire_unreachable;
513 }
514
515 static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
516 {
517 struct expire_reflog_policy_cb cb;
518 unsigned long now = time(NULL);
519 int i, status, do_all;
520 int explicit_expiry = 0;
521 unsigned int flags = 0;
522
523 default_reflog_expire_unreachable = now - 30 * 24 * 3600;
524 default_reflog_expire = now - 90 * 24 * 3600;
525 git_config(reflog_expire_config, NULL);
526
527 save_commit_buffer = 0;
528 do_all = status = 0;
529 memset(&cb, 0, sizeof(cb));
530
531 cb.cmd.expire_total = default_reflog_expire;
532 cb.cmd.expire_unreachable = default_reflog_expire_unreachable;
533
534 for (i = 1; i < argc; i++) {
535 const char *arg = argv[i];
536 if (!strcmp(arg, "--dry-run") || !strcmp(arg, "-n"))
537 flags |= EXPIRE_REFLOGS_DRY_RUN;
538 else if (starts_with(arg, "--expire=")) {
539 if (parse_expiry_date(arg + 9, &cb.cmd.expire_total))
540 die(_("'%s' is not a valid timestamp"), arg);
541 explicit_expiry |= EXPIRE_TOTAL;
542 }
543 else if (starts_with(arg, "--expire-unreachable=")) {
544 if (parse_expiry_date(arg + 21, &cb.cmd.expire_unreachable))
545 die(_("'%s' is not a valid timestamp"), arg);
546 explicit_expiry |= EXPIRE_UNREACH;
547 }
548 else if (!strcmp(arg, "--stale-fix"))
549 cb.cmd.stalefix = 1;
550 else if (!strcmp(arg, "--rewrite"))
551 flags |= EXPIRE_REFLOGS_REWRITE;
552 else if (!strcmp(arg, "--updateref"))
553 flags |= EXPIRE_REFLOGS_UPDATE_REF;
554 else if (!strcmp(arg, "--all"))
555 do_all = 1;
556 else if (!strcmp(arg, "--verbose"))
557 flags |= EXPIRE_REFLOGS_VERBOSE;
558 else if (!strcmp(arg, "--")) {
559 i++;
560 break;
561 }
562 else if (arg[0] == '-')
563 usage(reflog_expire_usage);
564 else
565 break;
566 }
567
568 /*
569 * We can trust the commits and objects reachable from refs
570 * even in older repository. We cannot trust what's reachable
571 * from reflog if the repository was pruned with older git.
572 */
573 if (cb.cmd.stalefix) {
574 init_revisions(&cb.cmd.revs, prefix);
575 if (flags & EXPIRE_REFLOGS_VERBOSE)
576 printf("Marking reachable objects...");
577 mark_reachable_objects(&cb.cmd.revs, 0, 0, NULL);
578 if (flags & EXPIRE_REFLOGS_VERBOSE)
579 putchar('\n');
580 }
581
582 if (do_all) {
583 struct collect_reflog_cb collected;
584 int i;
585
586 memset(&collected, 0, sizeof(collected));
587 for_each_reflog(collect_reflog, &collected);
588 for (i = 0; i < collected.nr; i++) {
589 struct collected_reflog *e = collected.e[i];
590 set_reflog_expiry_param(&cb.cmd, explicit_expiry, e->reflog);
591 status |= reflog_expire(e->reflog, e->sha1, flags,
592 reflog_expiry_prepare,
593 should_expire_reflog_ent,
594 reflog_expiry_cleanup,
595 &cb);
596 free(e);
597 }
598 free(collected.e);
599 }
600
601 for (; i < argc; i++) {
602 char *ref;
603 unsigned char sha1[20];
604 if (!dwim_log(argv[i], strlen(argv[i]), sha1, &ref)) {
605 status |= error("%s points nowhere!", argv[i]);
606 continue;
607 }
608 set_reflog_expiry_param(&cb.cmd, explicit_expiry, ref);
609 status |= reflog_expire(ref, sha1, flags,
610 reflog_expiry_prepare,
611 should_expire_reflog_ent,
612 reflog_expiry_cleanup,
613 &cb);
614 }
615 return status;
616 }
617
618 static int count_reflog_ent(struct object_id *ooid, struct object_id *noid,
619 const char *email, unsigned long timestamp, int tz,
620 const char *message, void *cb_data)
621 {
622 struct expire_reflog_policy_cb *cb = cb_data;
623 if (!cb->cmd.expire_total || timestamp < cb->cmd.expire_total)
624 cb->cmd.recno++;
625 return 0;
626 }
627
628 static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
629 {
630 struct expire_reflog_policy_cb cb;
631 int i, status = 0;
632 unsigned int flags = 0;
633
634 memset(&cb, 0, sizeof(cb));
635
636 for (i = 1; i < argc; i++) {
637 const char *arg = argv[i];
638 if (!strcmp(arg, "--dry-run") || !strcmp(arg, "-n"))
639 flags |= EXPIRE_REFLOGS_DRY_RUN;
640 else if (!strcmp(arg, "--rewrite"))
641 flags |= EXPIRE_REFLOGS_REWRITE;
642 else if (!strcmp(arg, "--updateref"))
643 flags |= EXPIRE_REFLOGS_UPDATE_REF;
644 else if (!strcmp(arg, "--verbose"))
645 flags |= EXPIRE_REFLOGS_VERBOSE;
646 else if (!strcmp(arg, "--")) {
647 i++;
648 break;
649 }
650 else if (arg[0] == '-')
651 usage(reflog_delete_usage);
652 else
653 break;
654 }
655
656 if (argc - i < 1)
657 return error("Nothing to delete?");
658
659 for ( ; i < argc; i++) {
660 const char *spec = strstr(argv[i], "@{");
661 unsigned char sha1[20];
662 char *ep, *ref;
663 int recno;
664
665 if (!spec) {
666 status |= error("Not a reflog: %s", argv[i]);
667 continue;
668 }
669
670 if (!dwim_log(argv[i], spec - argv[i], sha1, &ref)) {
671 status |= error("no reflog for '%s'", argv[i]);
672 continue;
673 }
674
675 recno = strtoul(spec + 2, &ep, 10);
676 if (*ep == '}') {
677 cb.cmd.recno = -recno;
678 for_each_reflog_ent(ref, count_reflog_ent, &cb);
679 } else {
680 cb.cmd.expire_total = approxidate(spec + 2);
681 for_each_reflog_ent(ref, count_reflog_ent, &cb);
682 cb.cmd.expire_total = 0;
683 }
684
685 status |= reflog_expire(ref, sha1, flags,
686 reflog_expiry_prepare,
687 should_expire_reflog_ent,
688 reflog_expiry_cleanup,
689 &cb);
690 free(ref);
691 }
692 return status;
693 }
694
695 static int cmd_reflog_exists(int argc, const char **argv, const char *prefix)
696 {
697 int i, start = 0;
698
699 for (i = 1; i < argc; i++) {
700 const char *arg = argv[i];
701 if (!strcmp(arg, "--")) {
702 i++;
703 break;
704 }
705 else if (arg[0] == '-')
706 usage(reflog_exists_usage);
707 else
708 break;
709 }
710
711 start = i;
712
713 if (argc - start != 1)
714 usage(reflog_exists_usage);
715
716 if (check_refname_format(argv[start], REFNAME_ALLOW_ONELEVEL))
717 die("invalid ref format: %s", argv[start]);
718 return !reflog_exists(argv[start]);
719 }
720
721 /*
722 * main "reflog"
723 */
724
725 static const char reflog_usage[] =
726 "git reflog [ show | expire | delete | exists ]";
727
728 int cmd_reflog(int argc, const char **argv, const char *prefix)
729 {
730 if (argc > 1 && !strcmp(argv[1], "-h"))
731 usage(reflog_usage);
732
733 /* With no command, we default to showing it. */
734 if (argc < 2 || *argv[1] == '-')
735 return cmd_log_reflog(argc, argv, prefix);
736
737 if (!strcmp(argv[1], "show"))
738 return cmd_log_reflog(argc - 1, argv + 1, prefix);
739
740 if (!strcmp(argv[1], "expire"))
741 return cmd_reflog_expire(argc - 1, argv + 1, prefix);
742
743 if (!strcmp(argv[1], "delete"))
744 return cmd_reflog_delete(argc - 1, argv + 1, prefix);
745
746 if (!strcmp(argv[1], "exists"))
747 return cmd_reflog_exists(argc - 1, argv + 1, prefix);
748
749 return cmd_log_reflog(argc, argv, prefix);
750 }